The fans don't come on until hot normaly, unless the a/c is on.
If your worrried about it, than just drive with the a/c "on".
Personly, I never turn mine off, I just adjust the cabin temp. my car never gets over 210 sitting in traffic with the a/c ON, normal is about 200, and I live in FL.
Now if I do not use the a/c, I will NOT run below 210.